Fornia



H W. MUHLEISEN AND C. LUND.

TIMER. APPLICATION FILED OCT 21, 1918.

Patented June 3, 1919.

I Ly. 3.

555% i fill z E STATES PATENT OFFICE.

HENRY w. MUHLEI'SEN AND oLEMivIEn LUND, or Los ANGELES, CALIFORNIA; SAID MUHLEISEN Assrcivon OF HIS RIGHT TO WILLIAM s. RUSH, or Los ANGELES, CALI- FORINIA.

j TIMER.

Patented June 3, 1919.

Application filed October 21', 1918. Serial No. 259,033.

To all whom it may concern:

Be it known that we, HENRY W. MUHLEI- SEN and CLEMMEN Lorin, citizens of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Timers, of whichthe follow ing is a'specification.

Our invention relates to a timer or commutator for use in connection with multicylinder engines.

The object of our invention is to provide a timer of the Ford type that will be simple in construction and positive in its .action.

Another object is to provide a timer with a combined rolling and sliding contact action which will keep the contact surfaces clean and insure perfect electrical connection between the generator and spark plugs.

With these and other objects in view, our invention consists in the construction, combination and arrangement of parts hereinafter described and claimed.

In the accompanying drawings which form a part of this specification,

Figure 1 is a plan view of a timer, embodying the principles of. our invention, with part of the casing broken away and shown in section. I

Fig. 2 is a view in side elevation of the timer shown in- Fig. 1 with parts broken away and shown in section.

Fig. 3 is a detailed sectional view on the line 3-3 in Fig. 1, showing the contact roller, its mounting parts and its controlling spring.

i The timer is ofa Ford type and comprises a casing 10 within which is fixed an insulating ring 11 in which contact plates l2.are embedded. These contact plates connect with binding posts 13, the binding posts beinginsulated from the casing by bushings 14. A cam shaft 15 turns in the center of the casing. A sleeve 16 having two parallel radial bearing lugs 17 and 18 formed integral with it, is keyed to the cam shaft within the casing and is held thereon by a nut 19, which screws on the end of the shaft. A roller arm 20 having a pivot pin 21 at one end which extends through the bearing lugs 17 and 18 has a pivot screw 22 fixed in its free end upon which-a flanged roller 23 is mounted, the head 24 of the pivot screw serving to hold the roller in place. As shown in Fig. 2, roller 23 is adapted to travel inside the insulating ring 11 and contact with contact plates12. It has an end flange 25 adapted to press against the inner edge 26 of the insulating ring 11. A retractile coil spring 27 having one end fixed in bearing lug 17 and the other in the pivot pin .21 serves the double purpose of holding the roller 23 against the insulating ring 11 and contact plates 12 by its unwinding tension and holding'the flange 25 against the edges of the insulating ring 11 and contact plates 12 by its retractile tension, the latter acting to withdraw pivot pin 21 frombearing lugs 17 and 18.

Operation: As the cam shaft 15 turns in the direction indicated by the arrow at, the. sleeve 16 and bearing lugs 17 and 18 formed integral therewith are carried around with it. The roller arm 20 pivoted in lugs 17 and 18 and the roller 23 attached thereto are thus caused to revolve around the cam shaft. The spring acts throughthe roller arm to press the roller against the inner periphery of the insulating ring 11 and the contact plates 12, in the .direction indicated by arrow 1), by its unwinding tension and at the same time acts to press the roller flange 25 against the inner edges of the insulating ring 11 and contact plates 12 in the direction indicated by arrow 0 by its retractile tension. A rolling contact is thus produced between the roller and plate faces while a combined rolling and sliding contact is produced between the roller flange and the edges of the contact plates. This combined rolling and sliding contact insures a bright contact surface and of the casing; a sleeve keyed upon the cam shaft-within the casing; two radial bearing lugs extending from the sleeve; a roller arm fitting against'the outer face of one lug; a, pivot pin extending from the roller arm Q mosses through the lugs; a roller carried by the roller arm and adapted to travel inside of the insulating ring and engage the contact plates, and having an end flange adapted to 5 press against the inner edge of the insulatng ring; and a coil spring mounted upon theplvot pin between the bearing lugs, one

end of the spring being connected to a lug and the other end of the spring being con- 13) nected to the pivot pin, the tension of the spring being exerted to hold the roller against the insulating ring and contact plates and to hold the flange against the edges of the insulating ring and contact plates.

15 In testimony whereof We have signed our names to this specification.

HENRY W. MUHLEISEN. CLEMMEN LUND. 

